Dividing-table for punching-presses.



T. POLJAKOPF-KOWTUNOFF. DIVIDIN G TABLE FOR IUNGHING PRESSES.

A PPLIGATION FILED JAN. 2, 1907.

Patented June 29, 1909.

3 SHEETS-BHEET 1.

ll I

WITNESSES 3 INVENTOR,

THEoc'nsTE POLJAKOF F-KOWTUNOF F,

ATTORNEY.

rms NORRIS FETERS C0,, WASHINCTDNID, c.

T. POLJAKOPF-KOWTUNOFF. DIVIDING TABLE FOR PUNGHING PRESSES.

APPLICATION FILED JAN. 2, 1907.

Patented June 29, 1909 3 SHEETS-SHEET 2 wnmsssss, INVENTO? WTUNOF BY ATTORNEY.

T. POLJAKOFF-KOWTUNOFF. DIVIDING TABLE FOR PUNGHING PRESSES.

APPLICATION FILED JAN. 2, 1907.

926,601 Patented June 29. 1909.

WiTNESSES.

INVENTOR, THEOC'T\ST'E. POLAA OFF-KOWTU OFF,

ATTORNEY.

1n: mums Pn-mzs cm, WASNINGYDN, o. c.

THEOOTISTE POLJAKOFFIO\VTUNOFF, OF ST. PETERSBURG, RUSSIA.

DIVIDING-TABLE FOR PUNCHING-PBESSES.

Specification of Letters Patent.

Patented June 29, 1909.

Application filed January 2, 1907. Serial No. 350,494.

To all whom it may concern:

Be it known that I, Tnnocrrs'rn PoLJA- KorF-KowrUNoFr, a subject of the Emperor of Russia, and resident of St. Petersburg, Russia, have invented certain new and use ful Improvements in Dividing-Tables for Punching-Presses, of which the following is a specification.

This invention has for its object a table, which is connected with a punching press and serves to automatically divide and punch holes without preliminary marking.

On the annexed drawing Figure 1 represents a plan horizontal section; Fig. 2 is an end view of the dividing mechanism and side view of the table; Fig. 3 is a section of the table and a side view of the mechanism; Fig. 4 is a side view; Fig. 5 is a plan of a modified arrangement for moving the table.

The table is made for dividing into mm. with an accuracy up to 1/100 mm.

On Figs. 1 and 3, are shown the pulleys and gear wheels of the punching press which is connected with the dividing mechanism by means of a chain and by chain-wheels R, R These wheels are disposed, timed and connected in such a manner that when the press is punching a hole, the table stands still and that when the punch of the press is raised, the table moves or feeds the article to be unched. The driven wheel R revolves freely on shaft a (Fig. 1) or may be coupled therewith by means of a toothed collar 7) which is shifted, as desired, by hand lever r; on the ends of shaft a are cranks c 0 having a groove along which it is possible to move and lock bolts d and (1 These said bolts pivotally engage the ends of links or rods 6, e the other ends of which are pivotally connected, by stationary pins, to leversf, f; on the ends of levers f, f are reversible pawls t, t which enter edge teeth of and actuate the gear wheels I) and L. I/Vheel L (serving to divide into mm.) is connected with clutch m, which carries two freely-revolving gear wheels II, rolling, when clutch m rotates, along the interior teeth of gear wheel g and, when clutched, actuating the gear wheel K connected to shaft a. On the latter, is a gear wheel O, which, by means of gear wheel 13 and shaft O, transmits movement to gear wheel A; the latter gear wheel moves a table h by engagement with a geared rack 29. The bearing of shaft O has a guiding slide s, (Fig.

'3) which, when the table is moving, slides along rack p and holds the rack and gear wheel A from disengagement. The extent of movement of table It varies as the movement of pawl t is adjusted by bolt (Z on crank c.

\Vhcel D (Fig. 1) serves for dividing into hundreds of mm., and is actuated by pawl t which engages the teeth of said wheel; a gear wheel, E, rotates with wheel I), and moves a screw wheel or worm gear 9 toward the movement of gear wheel I1 and socket m, by means of beveled gears M, M and screw P and thus accelerates the movement of gear wheels II, in accordance with the adjustment of bolt (Z in crank 0 thereby cumulating the two feeds, the amount of feed of wheel D being added to that of wheel L.

Cranks c, c are furnished with a scale for the speedy adjustment to the desired size of feed.

In order to reverse the movement of the dividing table, pawls t, t are thrown forwardly or rearwardly as desired, and socket b is, if necessary, to disengage wheel R and again coupled, this being done to harmonize the movement of the table with the rise of the punch.

For smaller and more exact divisions, geared rack p may be replaced by screw 27 as shown in Figs. 4 and 5. Screw p is fastened rigidly in the ends of the table, gear wheels A, I), (l and shaft O are removed and a gear wheel 13, on shaft n, revolves gear wheel A which has an inside thread and, revolving in a stationary stand X, moves table 7L.

Claims.

1. In a feeding mechanism, the combina tion of a work supporting device, a shaft for moving said work, a differential gear connecting the work shaft with the main shaft, a unit feeding meclmnism connected with the main shaft and operating the differential gear of the work shaft, a fractional ratchet-feeding mechanism adapted to engage the unit feeding mechanism, and means for connecting the two mechzrnisms and cumnlating the two feeds.

2. In a feeding mechanism, the combination of :1 won: supporting device, a screw attached to said support, a bevel gear working on said screw and cooperating with a bevel gear on the main shaft and means for imparting to main shaft unit and fractional feed.

3. In a feeding mechanism, the combination of a work supporting device, a shaft for moving said work, a differential gear connecting the Work shaft with the main shaft,

a unit ratchet feeding mechanism connected With the main shaft, a fractional ratchet feeding mechanism, a gearing Wheel attached 5 to the fractional ratchet feed, and operating apair of bevel gears actuating a Worm, a toothed Wheel meshing With the Worm, said Wheel being toothed and engaging internally with a pair of spur Wheels carried by a sleeve,

10 said spur Wheels engaging with gears on the main shaft, all said transmitting mechanism being adapted to cumulate the two feeds, substantially as set forth.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing Witnesses.

THEOGTISTE POLJAKOFF-KOWTUNOFF.

Witnesses:

H. A. LOVIAGUINE, EDW. WANSGHEIDT. 

